STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

Successful/unsuccessful uses of the umount2 system call in RHEL 9 must generate an audit record.

DISA Rule

SV-258216r1155613_rule

Vulnerability Number

V-258216

Group Title

SRG-OS-000037-GPOS-00015

Rule Version

RHEL-09-654210

Severity

CAT II

CCI(s)

CCI-000130 - Ensure that audit records containing information that establishes what type of event occurred.
CCI-000169 - Provide audit record generation capability for the event types the system is capable of auditing as defined in AU-2 a. on organization-defined information system components.
CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.
CCI-002884 - Log organization-defined audit events for nonlocal maintenance and diagnostic sessions.

Weight

Fix Recommendation

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount2" system call by adding or updating the following rules in a file in "/etc/audit/rules.d".

-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount
-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount

To load the rules to the kernel immediately, use the following command:

$ sudo augenrules --load

Check Contents

To determine if the system is configured to audit calls to the umount2 system call, run the following command:

$ sudo auditctl -l | grep umount2

-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount
-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=-1 -F key=privileged-umount

If no line is returned, this is a finding.

Vulnerability Number

V-258216

Documentable

False

Rule Version

RHEL-09-654210

Severity Override Guidance

Check Content Reference

Target Key

5551